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GHK-Cu signals fibroblasts (the skin's collagen-producing cells) to upregulate the production of types I, II, and III collagen, as well as elastin, glycosaminoglycans, and decorin

"The human tri-peptide GHK and tissue remodeling." Journal of Biomaterials Science, Polymer Edition

Published in Pharmaceuticals by Sikiric and colleagues, the comprehensive review synthesizes decades of preclinical research demonstrating BPC-157s remarkable ability to modulate dopaminergic, serotonergic, glutamatergic, GABAergic, and nitric oxide systems simultaneously

Sinauer Associates, , Sunderland, Mass Srivastav S, Cui X, Varela RB et al (2023) Increasing dopamine synthesis in nigrostriatal circuits increases phasic dopamine release and alters dorsal striatal connectivity: implications for schizophrenia

It doesn't build muscle, alter hormone levels, or act as a performance-enhancing drug

Plasma levels hover around 200 nanograms per milliliter at age twenty